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madam [21]
2 years ago
5

The allele for a blue skin color, B, is dominant to the allele b which codes for gray-colored skin. He decided to mate a lizard

that is heterozygous with a lizard that is gray. What proportion of the offspring will be gray?
Biology
1 answer:
olya-2409 [2.1K]2 years ago
5 0
50%(or half)
All you need to do is create a basic punnet square
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Honeybees have been declining at dramatic rates in the last few years. Colony collapse disorder has been linked to a virus and r
guapka [62]

Answer:

The given situation is an example of <u>density dependent factor</u>.

Explanation:  

The density dependent factors are the factors that regulate the growth of a population. It is defined as the factors whose effects on the growth or size of a given population vary with the population's density. The various types of density dependent limiting factors are diseases, migration, safe drinking water, food availability, migration etc.

<u>Therefore, the given situation is an example of density dependent factor.</u>

5 0
3 years ago
Read 2 more answers
Why are ribonucleoside triphosphates the monomers required for rna synthesis rather than ribonucleoside monophosphates?
torisob [31]

Answer:

The phosphates provide energy for the bond between each nucleotide.

Explanation:

When each nucleotide is being bound, the two extra phosphates provide the energy needed for it to form the bind between each nucleotide that's being added to the RNA. Without this energy, the RNA wouldn't be able to form due to the lack of enough energy.

5 0
4 years ago
Which form successively larger vessels that carry blood toward the heart?
victus00 [196]

Answer:

Veins.

Explanation:

Heart is the main organs of circulatory system that transport blood in the body.Human heart is four chambered and separates the oxygenated and deoxygenated blood in the body.  

Arteries are responsible for the passage of blood from heart to the body parts. The deoxygenated blood from the body collect in the veins and transfer to heart. Arteries has high pressure than veins and veins are thinner than artery.

Thus, the answer is veins.

4 0
3 years ago
Sequence the steps, 1–4, in the order required to create a permanent slide of human cheek cells. [1 mark] Specimen dehydrated Sp
gogolik [260]

Answer:

The correct order is dehydration, embed in wax, cut into sections, staining

Explanation:

There are certain proceedings needed to obtain stained sections of vegetable or animal tissues for their microscope observations.

These steps are:

  • Obtention of the material: The tissue is cut to an adequate size.
  • Fixation: When tissues are extracted from the organism, they suffer autolysis and putrefaction, so they need to be fixated in order to keep their cells in the best state possible. Fixation involves preserving the original morphological and molecular characteristics of the tissue. Fixation avoids autolysis, putrefaction, distortion, and retraction of cells and the tissue that could affect its volume or morphology.  
  • Dehydration. Once fixated, the fixator must be eliminated and the tissue is dehydrated by using a gradual series of solutions with alcohol in ascendant concentrations. Dehydration must be gradual to avoid tissue deformation.
  • Inclusion. To obtain thin cuts that can be observed under the optic microscope, the tissues must be included in a consistent, firm substance, that might be either hydrophilic or hydrophobic. A hydrophobic medium is paraffin wax, that provides hardness and plasticity.  
  • Cut. The tissue included in wax must be cut in slides or sections thin enough to allow the diffusion and penetration of light. A microtome is used to perform these cuts. When using paraffine for tissue inclusion, the cuts are about  5 to 20 micrometers of thickness.
  • Stain. Once the cuts are performed, paraffin wax must be eliminated. This can be done by using an organic solvent. Then the tissue must be stained. Hematoxylin and Eosin are the most common dyes. Animal tissues in general do not have any natural color, so they need to be stained to be observed.  
7 0
4 years ago
Duncan was a subject in a clinical study that was designed to determine the effects of certain diets on health. While participat
Phantasy [73]

Answer:

The missing options are:

- steroid hormones

- carbs

- essential fatty acids

- PHO

The correct answer is essential fatty acids.

Explanation:

Essential fatty acids are the fats that our body can not produce by itself, but that are essential for the function of the body, so we have to consume foods that have these fats, such as fish, oysters, nuts, chia seeds, soybean oil, etc. The deficiency of these fats causes skin problems, alopecia, anxiety, depression, among other things.

6 0
3 years ago
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